This load shot a 1.05-inch group at 100 yards, with four of the bullets in. Pressures are about 20,000 pounds per square inch (psi) with 12.0 grains of A-5744 and Lyman’s 225646 55-grain cast bullet in the. Its best use is for low-pressure, cast-bullet loads in the. Marks Powder in Florida or Valleyfield in Quebec, Canada.Īccurate 5744 and Berger 40-grain Varmint bullets at 2,438 fps shot this group at 100 yards. Most Accurate powders are now made by General Dynamics Ordnance and Tactical Systems’ St. Powder shortages over the last few years have also aided Accurate’s acceptance, as handloaders turned to alternatives for unavailable favorites. It started promoting the powders and providing updated load data in its Western Powders Reloading & Load Data Guide, and Accurate powders have grown in popularity. In 1987, Accurate Arms started to move away from the surplus market and began selling newly manufactured propellants.Īccurate’s powders hung in limbo for some time, overshadowed by Alliant, Hodgdon, IMR and Winchester powders – until Western bought Accurate in 2005. Accurate Arms was incorporated in McEwen, Tennessee, in 1980, after several years of selling surplus powders from the U.S. Western bought Accurate Arms powders in 2005 to grow its business even more.Īccurate Arms started way back in 1946 as Accurate Arms and Machine, a gun shop in Chicago that sold surplus powders. So it was only natural to further fill its pipeline by developing and marketing its own Ramshot brand of propellants in 1998. Since then, Western, from its home base in Miles City, Montana, created an efficient delivery system for those powders. 223 Remington combined for these groups at 100 yards.Western Powders has been a major distributor of various brands of gun powders in North America since 1972. Then again, a 1/9 twist barrel for a 77/22 and some Aguila SSS, is probably a much easier long term solution.Accurate 2460 and Sierra 69-grain bullets in the. I was mostly thinking of using these loads in more of a SWOS, silent without suppressor role, so no worries regarding baffle strikes. It also might take up more case capacity, which would MIGHT good for a lot of reasons regarding powder ignition, case to bore expansion ratio, etc. Has anyone ever experimented with turning the 75 BTHP around? They would hit harder because of more frontal area, although real world results might not be worth it.Īlso, it would move the CoP closer to the CoG, basically leaving the mostly hollow nose, now, a drag-reducing tail. And you would have a much more quiet setup on the 223 subsonic if it was functioning in the single shot straight pull operation. Even if it would, why? You would get much better terminal effect with a 300 whisper if you want subsonic semi-auto operation. The 223 subsonic would more than likely never be enough to operate a gas system. Yeah, you just answered your own question. The 300 Whisper works like this, but then again that uses more powder. I have thousands of those ready to go.Īlso, I think that a wide gas port opening in combination with a pistol length gas system and a light weight buffer/spring could allow for cycling. I'll take the advice given here from other folks and use lighter, shorter bullets. It will not have sufficient gas pressure to operate the BCG, so you'll be shooting straight pull bolt action style.ĮTA: I guess if I'd read the thread I wouldn't duplicate other's effort Since we're talking about a fast burning pistol powder here, velocity in a shorter barrel likely won't be much less. Using 4.5gr of Solo 1250, the bullet gets 1052 fps from a 24 inch barrel. Is there a load to make H335 send 75grs subsonic? Also, will 75gr bullets stabilize enough at that low of a velocity to prevent baffle strikes? I'll be shooting out of an 18" 1x7" twist WOA SPR barrel.ĭisclaimer: I know that any load data provided is "use at your own risk" and I know to start loading 10% less than the provided load and work my way up.Īccurate Arms lists a subsonic load with Hornady 75gr BTHP. I've read that subsonic rifle loads usually use pistol powder, and usually only around 5gr of it.ĭoes anyone know the best powder and charge for 75gr subsonics? I've got a bunch of H335 that I use for 55gr full power rounds. I'll be using bulk 75gr HPBT bullets from wideners and wolf SRM primers. 223 suppressors, which is what I'll be shooting my subs through. I've searched the archives, but every thread about sub.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |